Choose the best definitions of parameter and statistic. A statistic is a variable that describes a sample and a parameter is a variable that describes a population. A parameter is an unknown characteristic of a group and a statistic is a known characteristic of a group. A statistic is a number that describes a population and a parameter is a number that describes a sample. A statistic is a number that describes a sample and a parameter is a number that describes a population. A parameter is a number that describes a population. A statistic is a number that is used to estimate a parameter.

Answer:A statistic is a number that describes a sample and a parameter is a number that describes a population.Step-by-step explanation:The definition of "statistic" is:A piece of data from a portion of a population.The definition of "parameter" is:A value that tells you something about a population.Using these definitions, the correct answer to the question is that a statistic is a number that describes a sample and a parameter is a number that describes a population.